showing 36 of ~574560 from 574555 documents
An investigation of the compatibilization of blends of polyethylene and a semirigid liquid crystalline polymer
1996
The mechanical properties of blends with liquid crystalline polymers are in general poor and lower than those expected on the basis of additivity rule because of the strong incompatibility between the flexible and rigid components. Compatibilization is then necessary to enhance the adhesion between the two phases and then to improve the final properties of these blends. The addition of maleic anhydride functionalized polymers could give rise to some compatibilization because of possible reactions between the maleic anhydride group and the end groups of the liquid crystalline polymers. These reactions do not seem to occur in blends of polyethylene and a semirigid liquid crystalline polymer. …
La moisson des autres. Les salariés agricoles aux XIXe et XXe siècles, Paris, Rencontres à Royaumont/Créaphis, 1996, 363 p.
1996
Investigation of flow and heat transfer in corrugated passages—I. Experimental results
1996
Abstract An experimental and numerical study of flow and heat transfer was conducted for a crossed-corrugated geometry, representative of compact heat exchangers including air preheaters for fossil-fuelled power plant. In this paper, we describe the method of applying thermochromic liquid crystals and true-colour image processing to give local Nusselt number distribution over the surface, and average Nu, both of quantitative reliability; a careful uncertainty analysis is also presented. Typical experimental results for heat transfer and pressure drop are presented and discussed for various geometries and Reynolds numbers, and are compared with literature data. Numerical predictions are disc…
First and second viscosity measurements in superfluid 3He-B
1996
By means of diaphragm-driven flow experiments in 3He-B in a thin slab geometry, we have measured the first and second viscosities, η and 3 at pressures of 0, 5, 10 and 29.3 bar. Our measurement of 3 has better established theoretical foundations than previous measurements and also extends to higher pressures. 3 and η were deduced from the frequency dependence of the flow dissipation determined from bandwidth measurements for several normal modes of the diaphragm; a first order slip correction was used in the determination of η. Near Tc, 3 α (1 - T/Tc)-1/2 in accordance with theoretical predictions but below T/Tc ~ 0.6 we observe a rapid drop in 3 signifying a departure from the hydrodynamic…
Un modello Completo per la Simulazione del Campo di Moto di Correnti a Pelo Libero Lentamente Variate: Applicazione Al caso di Alvei Meandriformi
1996
NATO ARW on Clouds — Session Summaries
1996
The two papers presented in this session focused on the role of dynamics in the water vapor distribution of the tropics and its implications to climate.
Differences in the midgut proteolytic activity of twoHeliothis virescens strains, one susceptible and one resistant toBacillus thuringiensis toxins
1996
The development of resistance to Bacillus thuringiensis toxic proteins is a growing concern because it could threaten both conventional and gene transfer use of this environmentally safe biological insecticide. The most common mechanism of resistance involves changes in binding affinity of toxin receptors in the insect midgut membrane. This has not been the case in Heliothis virescens. We have investigated changes in midgut proteolytic activity as a possibility to explain the resistance observed in this insect species. We have developed an improvement of known methods to demonstrate proteolytic activity in crude extracts. Using this method we have found differences in the proteolytic activi…
Kehittyvä, kansainvälistyvä, kaupallistuva ja kommunikoiva matkailu-Suomi : tiedusteluretki itsenäisen Suomen matkailuelinkeinojen alkutaipaleeseen e…
1996
Keräilystä kokoelmaan : sosiologisia ja filosofisia näkökulmia keräilyyn
1996
Didaktiskās-matemātiskās rotaļas kā pirmsskolas vecuma bērnu attīstības līdzeklis
1996
Advisor: Meikšāne, Dzidra
Africa Centro-Orientale e protezione dell’ambiente : alcuni cenni introduttivi
1996
Non disponibile
De la standardisation à la normalisation de la gestion médicalisée à l'hôpital : L’apport de la méthode de compensation structurelle et conjoncturelle
1996
Utilization of GHM in budget allocation leads to a reduction of strategic behaviors and restores equity between hospitals. However, heterogeneousness of GHM, with subgroups, is also generating perverse effects. The contractual economical analysis, applied to the statistical modelization of Quantin et al. (1995), underlines how the opportunist behaviors can be reduced. As the PMSI is almost unanimously adopted and considered as an irreversible investment, this approach generates questions on ways to improve the tool. The ultimate goal is to move from standardized costs tonormalized (optimized) costs for maximum efficiency of the tool. Finally, this statistical analysis generates a financial …
Les pratiques équestres: sport ou loisir
1996
L a Franche-Comté n'est pas une grande région d'élevage du cheval. Cependant, le Comtois, appelé aussi "Maîchard" en raison de ses origines. est l'une des dernières race de cheval de trait en expansion. Bien que moins connu que l' emblématique vache Montbéliarde, il n'est sans doute pas étranger à la création des premiers clubs hippiques sur les plateaux jurassiens.
Flow Cytometry versus Fluorescence Microscopy
1996
Since the pioneer work of the botanist Matthias Jakob Schleiden and the zoologist Theodor Schwann in 1839, and of Rudolph Virchow in 1859, cell research progressed in two opposite directions. Cell biologists focused their increasingly more powerful microscopies into the cell structure to reveal the great morphological complexity of the cytoplasm. A growing number of subcellular organelles thus challenged the early biochemists to discover their specific molecular features and their coordination to maintain an ordered cell life. The biochemists’ answer to such a challenge consisted usually in tearing apart cells into their discrete components and obtaining information on molecules and pathway…
Consecutive Selective Adsorption of Pentamidine and Phosphate Biomolecules on a Self-Assembled Layer: Reversible Formation of a Chemically Selective…
1996
In situ ellipsometric film thickness measurements, FT-IR external reflectance spectroscopy, and potentiometric measurements indicated that the amphiphile pentamidine (PAM), a bisbenzamidine, associated by self-assembly with a preformed self-assembled monolayer of a mercaptoalkanoic acid on gold. The structural properties of PAM and the nature of the substrate were ideal for the formation of a densely packed monolayer. This process was fully reversible, as demonstrated by changing the pH of the surrounding medium. Thus, disassembly−reassembly occurred when the pH was cycled between 8.7 and 3. The bilayer structure, featuring a positively charged amidinium surface, was subsequently used for s…
Multiscale Edges Detection by Wavelet Transform for Model of Face Recognition
1996
Publisher Summary The linear auto-associator is a particular case of the linear-associator. The goal of this network is to associate a set of stimuli to itself, which could be used to store and retrieve face images and it also could be applied as a pre-processing device to simulate some psychological tasks—such as categorizing face according to their gender. A technique of learning based on the wavelet transform can improve recognition capability when the pattern images are with a great noise. One of the ways to store and recall face images uses the linear auto-associative memory. This connectionist model is in conjunction with a pixel-based coding of the faces. The image processing using t…
Cambios en la masa ósea femoral tras enclavado endomedular de Grosse-Kempf
1996
El enclavamiento centromedular encerrojado es en la actualidad uno de los tratamientos de elección en las fracturas conminutas de la diáfisis femoral ya que permite controlar los acortamientos y las rotaciones interfragmentarias. Tras el tratamiento con este tipo de osteosíntesis y al encontrarse la fractura consolidada es habitual encontrar en las radiografías de control una imagen de porosis o espongialización femoral. Con este trabajo hemos pretendido cuantificar, mediante un procedimiento no invasivo, cómo es la densitometría ósea, la pérdida de masa ósea femoral producida tras la consolidación de las fracturas. Hemos estudiado 20 pacientes con fracturas conminutas de la diáfisis femora…
Algoritmos de soporte para Tolerancia a Fallos : Aplicación a la comunicación Punto a Punto/
1996
Ilustradores del Nonsense. Una aproximación a la obra gráfica de creadores de la época victoriana: Edward Lear, Lewis Carroll y Charles Doyle
1996
Practical Applications of Models of Oxygen Supply, Diffusion, and Consumption
1996
It is the objective of this paper to describe, what models of oxygen supply, diffusion, and consumption have been and can be used for and to discuss some common problems in employing mathematical models of O2 transport. In a first part, four typical fields for model applications are selected from the wide variety of former investigations and are illustrated with some recent examples.
Characterization of the Altered Zone Around a Fracture in Palmottu Natural Analogue
1996
AbstractA drill core sample penetrating at a natural fracture has been analysed by helium gas techniques and by α-autoradiography. Porosity and diffusivity profiles away from the fracture have been determined and compared with structural profiles. Model calculations are used to determine the effects of sample size on the measured porosities and diffusivities.
Profili patrimoniali e finanziari degli enti ecclesiastici non riconosciuti
1996
Occorre subito delimitare l'oggetto del presente studio chiarendo che quando parliamo di enti ecclesiastici non riconosciuti intendiamo riferirci a quegli enti, caratterizzati dallo svolgimento di un'insostituibile funzione di progresso sociale e morale costituzionalmente rilevante, i quali non potendo o non volendo ottenere il riconoscimento della personalità giuridica ai sensi della legge 222/1985 vengono assoggettati al medesimo trattamento normativo riservato dal diritto comune agli enti di fatto. tra questi meritano particolare attenzione quegli enti dotati di personalità giuridica di diritto canonico che pur presentando un forte grado di istituzionalizzazione e di sottoposizione agli …
La enfermedad en Valencia a través de la historia
1996
La Persuasion dérisoire dans la branche VII du Roman de Renard
1996
La Persuasion dérisoire dans la branche VII du Roman de Renard
Valoración a medio-largo plazo de los cotilos de Mittelmeier
1996
El objetivo del presente trabajo es valorar clínica y radiológicamente la evolución de 125 cotilos de Mittelmeier implantados en nuestro servicio, con un seguimiento medio de 8 años (5,5-14). En toda la serie se ha utilizado un mismo tipo de cotilos, aunque se han utilizado 2 vástagos, los de segunda y los de tercera generación. El comportamiento ha sido satisfactorio en el 91% de los de tercera generación y el 57% en los de segunda. Se comprobó una inclinación y recubrimientos progresivos y una emigración horizontal y vertical significativas de los cotilos. No se encontró relación entre los resultados clínicos y las alteraciones posicionales. La movilización del cotilo aparece en nuestra s…
Física 2º de Bachillerato
1996
La Física de este nivel tiene dos objetivos básicos. Primero, adquirir los conocimientos conceptuales, metodológicos, etc., imprescindibles para aquellos que vayan a seguir más tarde estudios superiores de ciencias e ingeniería. Segundo, contribuir a la formación cultural de los futuros ciudadanos, haciéndoles a comprender desde gran parte de los dispositivos cotidianos hasta el cosmos en su globalidad y mostrándoles las relaciones Ciencia, Tecnología y Sociedad (CTS) y sus consecuencias en la vida humana y en el medio ambiente. Para conseguir el primero de ellos, se introducen actividades problemáticas, que llevan a emitir hipótesis, elaborar y afianzar conocimientos, explorar alternativas…
Reconstitución inmune en el trasplante autólogo de células germinales hematopoyéticas
1996
HDL Subtractions Distribution in Renal Transplant Recipients: Lack of Evidence of a Reduction of HDL<sub>2</sub> Particles
1996
Since the high rate of cardiovascular disease in renal transplant recipients, alterations of lipoprotein profile in such patients were extensively evaluated, but the HDL subclass profile was not completely clarified. Renal transplant recipients usually show normal to high plasma levels of HDL cholesterol, even if some investigations suggested a persistence of low HDL2 levels: this was not useful in terms of cardiovascular protection. We designed this study in order to evaluate HDL subfractions distribution in renal transplant recipients. We studied 55 renal transplant recipients, treated with prednisone, azathioprine and/or cyclosporine, and 34 healthy normolipidemics as controls. In all su…
Linear Diophantine Problems
1996
The Frobenius number g(A k ) Let A k \({A_k} = \{ {a_1},...,{a_k}\}\subset\) IN with gcd(A k ) = 1, n\( \in I{N_0}.\) If $$n = \sum\limits_{i = 1}^k {{x_i}{a_i},{x_i}}\in I{N_0}$$ (1) we call this a representation or a g-representation of n by Ak (in order to distinguish between several types of representations that will be considered in the sequel). Then the Frobenius number g(A k ) is the greatest integer with no g-representation.
Struktur und Eigenschaften der Proteine
1996
Proteine sind fur fast samtliche Funktionen der Zelle von grundsatzlicher Bedeutung: Als Enzyme sind sie die Trager aller biokatalytischen Funktionen, als Transportproteine in den Zellmembranen und Korperflussigkeiten sind sie fur den selektiven Stofftransport verantwortlich, als kontraktile Proteine vermitteln sie die Umwandlung chemischer Energie in mechanische Arbeit, als Skieroproteine haben sie Stutz- und Gerustfunktionen, um nur einige wesentliche Funktionen zu nennen.
Jeńcy wojenni II wojny światowej : stan archiwów i najnowszych badań : materiały z ogólnopolskiej konferencji naukowej 11-12 września 1995 r
1996
Les coûts de production des vins d'AOC en Bourgogne
1996
A fait l'objet d'une communication à la 4. Conférence internationale de la Vineyard Data Qualification Society, les 16-17/02/1996 à Saragosse (SPA); National audience; Le système de production du vin en Bourgogne est caractérisé par des propriétés de petites tailles, chaque viticulteur exploitant plusieurs parcelles, de plusieurs villages, associées à l'une des AOC classées selon 4 niveaux hiérarchiques. Cette organisation amène à définir le concept de "portefeuille d'appellations" attaché à chaque exploitation. L'objectif de la réflexion est de vérifier si les comportements des viticulteurs les conduisent à avoir des coûts de production (ici le coût du raisin sur pied) qui dépendent d'une …
Le regard de l'autre, le Komintern et le PCF
1996
La història de les ciències en l'ensenyament de la física i la química
1996
TESI DOCTORAL : “LA HISTÒRIA DE LES CIÈNCIES EN L’ENSENYAMENT DE LA FÍSICA I LA QUÍMICA” RESUM El problema que s’ha investigat en aquest treball consisteix en l’anàlisi del paper que juga actualment la Història de la Ciència en l’ensenyament de la Física i la Química i de la seua influència en la imatge de la ciència i en les actituds dels alumnes. S’hi han investigat dues hipòtesis principals. La primera consisteix en la constatació de l’escàs paper atribuït habitualment a la Història de la Ciència, tant en els llibres de text, com per part del professorat i en la seua influència en la imatge deformada de la ciència que aplega als alumnes, així com les seues actituds d’escassa apreciació p…